Stone-sawing machine



(No Model.)

H. HARTLBY.

STONE SAWING MAGHINE.

No. 340,875. Patented Apr. 27, 1886.

N. PETERS. Fhnku-Lhhographar. Washimslm D. C.

UNITED STATES PATENT OFFICE.

HENRY HARTLEY, OF MINNEAPOLIS, MINNESOTA.

STONE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 340.875, dated April 27, 1886.

To @ZZ whom it may con/cern:

Be it known that I, HENRY HARTLEY, a citizen of the United States, and a resident of Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain Improvements in Stone Saw-Mills, of which the following is a specification.

This invention relates particularly to mills that are used for sawing stone, though a part of the devices herein employed are applicable as well to other machines.

This invention consists, generally, in the construction and combination hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings,forming part of this specification, Figure 1 is a side eleva tion of my machine. Fig. 2 is au end elevation. Figs. 3 and 4 are enlarged details ofthe cross-head and support. Fig. 5 is a modification.

In the drawings, 2 represents the frame of the mill, which may be of any suitable construction.

3 is the carriage for supporting the stone, which moves on suitable rails, 5.

7 isthe saw-frame, in which are supported any desired number of saws. This frame is suspended by rods 9 from the cross-bars 1l, that move in the vertical guides 13. These rods are free to oscillate, and the saw-fra1ne may be reciprocated to carry the saws back and forth in the stone. As heretofore constructed,thesawfran1es are connected directly to a pitman that is operated by a suitable crank. Vhen the saw-frame is above or below the crank-shaft, the thrust of the crank causes the frame to jump, raising the saws from the stone. To obviate this objection is one of the main objects of my invention. The cross-bars 11 are connected to cords 15 17, that pass over idler-pulleys 19 21, and are wound in opposite directions upon a drum, 23.

To the front of the saw-iframes a connectingrod, 25, is secured by suitable means. The opposite end of the rod is secured by va pivot, 29, in a sliding cross-head, 27. A pitman, 33, operated by a crank-shaft, 37, is secured bya pivot, 31, to the opposite end of the crosshead.. l This cross-head reciprocates in ways formed in a verticallymovable cross-head sup- Seliul No. 1136,436. (No model.)

port, 35. The thrust of the crank is taken by the crosshead, which is caused by the guides to reciprocate in a right line, even though it may be above or below the crank-shaft. The saw-frame will therefore receive its motion directly from the cross-head, and will not be affected by the upward or downward thrust of the crank.

The cross-head support is arranged to move in a direction at right angles to the line of reciprocation of the cross-head.

Any suitable means may be used for holding and guiding the cross-head support. I have shown one means for this purpose. The support 35 is provided with vertical ribs 39, that fit into ways formed between the vertical posts 41 43. A cord, 45, attached to the upper end of the cross-head support, passes over an idler-pulley, 47, and is wound. upon the drum 23. A second cord, 49, is attached to the lower end of the support, passes under the idler 51, over the idler 53, and is wound upon the drum 23 in the opposite direction. A pulley, 55, is secured upon one end of the drum 23. A cord, 57, is wound partially upon this pulley, and passes thence over an idler, 59, and is wound upon a pulley or spool, which is provided with a crank, 63. A weighted brake-lever bears upon a disk on the edge of this spool, and prevents the turning of the spool, except when it is moved by the feed hereinafter described. The spool-shaft is provided with a ratchet, 67. A lever, 69, carrying a pawl, 71, is mounted on the axle of the spool, and its opposite end is jointed toa rod, 73, that is attached to an adjustable pin, 75, in a crank-disk, 77. This disk is rotated by suitable means, and at each revolution the spool 61 is turned one or more notches of the ratchet. This allows the weight of the saw' frame and cross-head support to unwind the cords from the drum 23 and the saws to be fed down to their work.

An essential feature of this machine is the means for connecting the saw-frame to the pitman, so that the motion of the saw-frame is the same, whether the frame is above, on aline with,or below the crank-shaft. At the beginning of the work in sawing large blocks of Ico stone the saw-frame will usually be considerably above the crank-shaft, and it will be grad ually fed down as the saws cut'through the stone. I consider the cross-head mounted in a vertically-moving support, as described, the preferable means for connecting the saw-frame and pitman; but other means may be used for this purpose With good results.

Instead of sliding in Ways,the block 27, which forms the cross-head, may be supported on a hanger, 28, that is pivoted at 30 in the upper part of the support 35, as shown in Fig. 5. The support 35 is vertically movable, as in the other instance. The reciprocating block 27 takes the thrust of the crank, as before.

The support 35 may be vertically adjusted by other means than cords, as suitable adjusting-screws.

.The rods or hangers 9, that support the saW frame, are shown connected to this frame, so that their lower ends are slightly nearer together than their upper ends. Vith this arrangement,when the frame is swung back and forth, the saws bear harder on the stone at the outgoing than at the ingoiug end, and hence the dirt is thrown out of the cut.

I claim as my inventionl. The combination, in a machine of the class described, with the saw-frame, of the vertically-sliding support 35, means for moving said support, the transversely-moving block 27, mounted in said support, the connectingrod secured to the saw-frame and pivoted to said block, andthe pitman pivoted to said block and connected with the crank-shaft of the machine, substantially as described.

2. rlhe combination, in a machine of the class described, with the vertically-adjustable saw-frame, ofthe vertically-sliding support 35, means for moving said support, the transversely-moving block mounted in said support, the connecting-rod 25, and the pitman 33, pivoted to opposite ends of said block', substantially as described.

In testimony whereof I have hereunto set myhand, in presence of two witnesses, this 18th day of December, 1885.

HENRY HARTLEY.

Vitnesses:

A. C. PAUL, R. H. SANFORD. 

